A peak flow meter is a handheld device that measures airflow rate and can help those with respiratory conditions like asthma monitor their condition.

This test uses saliva and connects to your phone to deliver quick insights into your stress hormones -- no needles needed.

A pulse oximeter is a device that clips on your finger, toe, or earlobe to measure blood oxygen saturation. Here's how it works and how to read it.

Discover why KOH equivalence is used to report TBN values and how it ensures consistency across oil condition monitoring ...